Nothing moves down the road as imperiously as a Range Rover. It’s just one of those cars: the only thing more empowering than actually driving one is being driven in it, a statement that you, sir or madam, have seriously arrived in life.

Although in some circumstances that’s not a wholly good thing, which is where the Range Rover Sentinel comes in. If not the ultimate high-performance version of the car, it’s certainly the one you’d want to find yourself in when the messy stuff hits the fan. The Sentinel – there’s a name to conjure with – is the armoured Range Rover, with a protection cell at its core augmenting the car’s already peerless chassis. This has been constructed “in accordance with full ballistic and blast certification”, which includes resisting improvised explosive devices (IEDs) in addition to blast-proof glass and roof.

A product of Land Rover Special Vehicle Operations, the Sentinel’s options list makes for unusual reading. Forget fancy paint treatments or enlarged alloy wheels – although you can have those if you want – this runs to items such as a specially designed front-passenger window that lowers 150mm for “document delivery”, sirens and emergency lighting, and a PA system that allows the occupants to address people outside. Theresa May might like to get herself one in time for 29 March.

This being a Range Rover, it can also effect escape across hostile terrain, the sort of thing other armoured limos can’t handle – mountains, rivers, the lot. The chassis, suspension and brakes have all been uprated and the wheels incorporate a run-flat system enabling the car to keep going at speeds up to 50mph for a distance of 30 miles even if the tyres have been destroyed.

Despite its heady reinforcement, the Sentinel’s still pretty rapid; Range Rover’s supercharged V8 now has 375bhp and it’ll get to 62mph in under ten seconds. Not bad for a mobile fortress.